Crosstalk in the measurement of focal brain activation by near-infrared topography

N. Okui; E. Okada

doi:10.1117/12.632876

7 October 2005 Crosstalk in the measurement of focal brain activation by near-infrared topography

N. Okui, E. Okada

Proceedings Volume 5859, Photon Migration and Diffuse-Light Imaging II; 58591A (2005) https://doi.org/10.1117/12.632876
Event: European Conferences on Biomedical Optics 2005, 2005, Munich, Germany

Abstract

Crosstalk between oxy- and deoxy-haemoglobin observed in near-infrared topography is investigated. The light propagation in an adult head model is predicted by Monte Carlo simulation to obtain the change in intensity detected with source-detector pairs on the scalp caused by a focal absorption change in the brain. The topographic images of changes in oxy- and deoxy-haemoglobin are obtained from the changes in intensity detected with source-detector pairs on the scalp. The crosstalk depends on the relative position of the focal absorption change to source-detector pairs. The crosstalk is minimised when the focal absorption change is located below a measurement point that is the midpoint between a source and a detector. Appropriate selection of wavelength pair is effective to reduce the crosstalk in the topographic image.

Citation Download Citation

N. Okui and E. Okada "Crosstalk in the measurement of focal brain activation by near-infrared topography", Proc. SPIE 5859, Photon Migration and Diffuse-Light Imaging II, 58591A (7 October 2005); https://doi.org/10.1117/12.632876

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